George lauded



GEORGELAUDERI. "lmproyementjn Mach nes for-W'ashirng Coal.

Ptented May 30 AM: fHorn-Lmms/MP/J/c co Il. x l asso/mer momes. /4

ehines.`l

f The main portion of my machineissiinilar to such" as!` have? been beforeknown and have been loing` and successfully usedin England, l the object beingto` separate the pyrites andl s other foreignmatter from coal in thelarge lames ATE-Nr nalen.;

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Specification formingpart?of` LettersiPatent No; 115,486, dated MaySO, 1871.

TeaM/whomit'may concm v v Be` it ,known thatIyGnoRGE LANDER, en-

f gineer,formerly` ofGlasgow, Scotland, now i residing` in NewYork cityyin thelState of New World-have invented certain new land `ments "in Goal--Washing lVIay y useful Improv` way, and to effect the `j operation with a due regard to economy; Itfrequires aliberal quantityof waterland amoderate expenditure 'ofl power. ,y y y 4 u The mechanism may be Vbrietl y described as composed of al larg'etank withf a perforated `platform forming a false bottom,-`anda large piston making short strokes in a cylinder communicatingwith the space below, and causing "an intermittent lifting of the coal on the platform. The foreign matters, being mostly heavierthan thecoal, sink to the bottom, and the coal, being constantly supplied at one side of the perforatedplatform, moves slowly across under the lifting motion, and, on arriving at the other side, the coal flows over with a stream of water atthe top and is received in a suita# ble car, while the denser foreign matter accumulates at the bottom and is discharged, either constantly or at intervals, through a suitable aperture at that point.A Thedust and other tine matter are washed out throughthe perforated bottom. and gather in the bottom of the tankzbelow. `The total loss of weight by .the

y washing process, with English coal,is between ten and twenty percent.

The object of my invention is to increase the efficiency and rapidity of the separation of the materials. I provide means for introducing the coal on the receiving side of the platform ata line close to the perforated flooring. Starting thus from a uniformly low level, the

coal rises without the dense matter, while,.as

` heretofore managed, the mixed-material was liable to be introduced promiscuously at the bottom or top, and, while that introduced at the bottom would frequently be treated longer than was necessary,that introduced at the top would pass over as coal while containing much unseparated metallic-and'earthy matter.

the apparatus'. `so much ofthe other parts as is necessary to The `accompanying drawing forms a partei' this specification, andis across-section through It shows the novel parts, with understand' their relations thereto.

Iwishit to be understood that my improvements are equally applicable to washing-inachines which act by continuous iiow 'of water instead i ofthe intermittent action above deintroduced at the .leftl side, and works across to ilow over 'the ledge G E on the 'rightba'n'd side,while the pyrites, slate, and other foreign matter are discharged through' the valve F, which is raised at intervals by means of the lever f. As this is arranged, the foreign matter discharged through the valve Vl mingles with the matter which is sifted through the perforations, and both are withdrawn together, at intervals, through the valve 0, when the bash is emptied and cleaned. Water is supplied through the pipe J, under control of I the cock K. I provide a solid plate o r deadfloor, A', along a sufficient breadth on the perforated iiooring, and mount over it an adjustable partition, D, which is supported by guides G C fixed on theinner faces of the bash or tank. This adjustable partition D is raised or lowered by means of the chain d or other suitable means so that the rate at which the coal may be moved forward under it may be regulated at pleasure. This gate may be formed of one solid plate, or it maybe made like a gridiron. In the latter case the separation of the impurities is facilitated by preventing the slack adhering in masses. The deadoor A may be formed by having the part of the perforated bottom it would cover. solid, or only slightly perforated, so as to be dead in comparison with the other more liberallyperforated parts. I prefer to have it entirely solid.

It will be understood that, in practice,there may be many cylinders .L and pistons B, mounted side by side, and worked by eccen-y tries on a single shaft,lVI; also, that there may he many pipes J and cocks K receiving water from a single main; and that there may be many valves F controlled by rods and levers from a single rockin g-shaft, turned by'hand or by power; that the inclined piane down which the coal is finally discharged may oe perforated and adapted to discharge all the water and to screen out most of the small sizes ot' the coal; that a cross-trough to receive. the screenings and water and other accessories may be employed, and that the form and proportions of the apparatus may be varied in many ways Without sacrificing the advantages due to the novel features in the invention.

I propose to make the movable partition D and the deadooring A of cast-iron. I esteem it important that there shall be a portion ot the perforated floor on the left ot' the deadflooring A', in order to enliven and facilitate the movement of the coal through the comparativel y narrow space under the partition D. A good proportion for each bash is tive feet three inches long, three feet three and a half inches Wide, and of any height of sides which may be preferred.` The perforated portion, which I have called a platform or iooring, may be of copper plate one-sixteenth of an inch thick, perforated with holes on esixteenth of an inch in diameter and one-eighth of an inch from center to center. This may rest upon cast-iron bars analogous to furnacegrate bars to give the proper support to the thin copper. The piston B for such a bash may be three feet in diameter and with a stroke of two and one-half inches, making one hundred strokes per minute.

It will he found convenient in practice to Work froml three to sin such hashes, with their operating pistons, side by side, and, by distributing the times of the descent of the pistons, the resistance on the operating-shafts Mmay he made approximately uniform.

I claim as my inventionl.y The adjustable gate D, combined with and arranged to serve, as 4represented, relatively to the perforated iiooring A, tank or bash N, and means B L for inducing an alter nate 11p-and-down motion of the Water through the openings in the flooring A, so that the coal and the foreign matter, while it may be tumbled proniiscuously in any convenient quantt ties on the receiving sides of the partition D, will beintrodneed to the separa-tingside thereof at the desired rate and at a uniform level, as herein specified.

2. The dead-iioorin g A,in combination with the gate D and with the perforated flooring A,

bash N, and means for inducing an alternate lip-and-down motion of the water through tho perforated portion of the ooring, as specied. In testimony whereof I have hereunto set my name in presence of two subscribing witnesses. n

Witnesses: GEO. LANDER.

THOMAS C. Srnrsox, C. C. LrvINGs. 

